#!/usr/bin/env python3
# -*- coding: utf-8 -*-
age = 3
if age >= 18:
    print('your age is',age)
    print('adult')
else:
    print('your age is',age)
    print('teenager')


age = 3
if age >= 18:
    print('adult')
elif age >= 6:
    print('teenager')
else:
    print('kid')

birth = input('birth:')
if birth < 2000:
    print('00前')
else:
    print('00后')
